CN104615805B - A kind of electronic controlled diesel key factor space filling design test method - Google Patents
A kind of electronic controlled diesel key factor space filling design test method Download PDFInfo
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Abstract
The present invention relates to a kind of electronic controlled diesel key factor space filling design test methods, this method comprises: identifying key factor space region by CobraPlan；Random operating condition filling is carried out to key factor space region, and to the corresponding key factor random assignment of each random operating condition, realization is uniformly distributed the operating point and key factor random continuous of key factor space region, obtains key factor space filling design testing program with this.The method of the present invention specifies high and low rotating speed and high underload according to external characteristic curve, can be by CobraPlan software definition key factor space region, and carries out space based on high and low rotating speed and high underload and fill at random, generates the random operating point in key factor space region；In addition, producing key factor value range according to space fill method by four vertex key factor nominal value of CobraPlan designated key factor space area and tolerance range value, key factor random assignment is carried out to each random operating point.
Description
Technical field
The present invention relates to the design experiment methods of diesel engine, specifically refer to a kind of electric-control diesel engine key factor
Space filling design test method.
Background technique
In engine development process, a kind of important parameter for influencing burning, performance and discharge is referred to as key factor, right
The adjustment and optimization of key factor are exploitation core links.Electric-control diesel engine key factor is primarily referred to as Combustion System ginseng
Number, including spray in advance advance angle, pre- distributive value, main jet advance angle, injection rail pressure, afterwards spray advance angle, rear distributive value, EGR aperture or
The parameters such as EGR rate, such parameter can be adjusted flexibly, and be required with this to meet each single-point operating condition and the different of state of cyclic operation.To pass
The key factor, which is adjusted with the conventional method of optimization, to be adjusted by experience, faces a large amount of bench test tests, while difficult
Effectively to be taken into account to coupled relation complicated in each key factor mistake.
Mathematical design test method is constantly progressive, and the solution of Multivariable Coupling relationship is annotated from principle, especially
It is suitable for the complex relationship for describing this multiple-input and multiple-output multi-constraint condition of electronic controlled diesel.With external characteristic curve and specify
Revolving speed, load define key factor space region, are filled at random to key factor space region, realize to key factor space
The operating point and key factor random continuous in area are uniformly distributed, while greatly reducing design experiment number, are a kind of efficient passes
Key factorial design experiment method, there is no such report at present.
Summary of the invention
The object of the invention the technical solution adopted is that a kind of electronic controlled diesel parameters sensitivity analysis method, this method according to
External characteristic curve and high and low rotating speed, the high underload of input define the software CobraPlan of key factor space region, pass through
CobraPlan carries out the random uniform filling of operating condition and key factor to key factor space region, exports key factor sky with this
Between filling design testing program.
The object of the invention is realized the technical solution adopted is that a kind of electronic controlled diesel key factor space filling design is tested
Method, this method comprises:
Key factor space region is identified by CobraPlan；
Random operating condition filling carried out to key factor space region, and the corresponding key factor of each random operating condition is assigned at random
Value, realization are uniformly distributed the operating point and key factor random continuous of key factor space region, obtain key factor sky with this
Between filling design testing program.
The invention has the following advantages that
(1) high and low rotating speed and high underload are specified according to external characteristic curve, it can be crucial by CobraPlan software definition
Factor space area, and space is carried out based on high and low rotating speed and high underload and is filled at random, generate the random work in key factor space region
Condition point.
(2) pass through four vertex key factor nominal value of CobraPlan designated key factor space area and tolerance range value, according to
Space fill method produces key factor value range, carries out key factor random assignment to each random operating point.
Detailed description of the invention
Fig. 1 is key factor design experiment generation method schematic diagram of the present invention.
Fig. 2 is at 4 points and defines operating condition area schematic diagram.
The random operating condition of Fig. 3 generates schematic diagram.
Fig. 4 key factor value schematic diagram.
Fig. 5 is that CobraPlan generates design experiment scheme calculation flow chart.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, electronic controlled diesel key factor of the present invention space filling design test method, comprising:
S100, external characteristic curve is read in CobraPlan, and after inputting high and low rotating speed and high underload, can combine
At tetra- vertex ABCD, key factor space region is thereby determined that；Generate random revolving speed according to high and low rotating speed, according to high underload and with
Machine revolving speed is corresponding to generate random torque with external characteristic curve torque, thus generates the design experiment operating point based on space filling.
S200 and each key factor nominal value in tetra- vertex ABCD according to the key factor and input of definition, tolerance range
Value generates the value range of key factor, and generates continuously distributed key factor value in conjunction with the total operating condition number of testing program, in conjunction with
Generated design experiment operating point is combined into the design experiment scheme based on space filling.
Key factor space in step S100 is operating condition face of interest, as shown in Fig. 2, the external characteristics based on input
Curve, high and low rotating speed and height load structure.The present embodiment identifies that key factor space region includes following step by CobraPlan
It is rapid:
1) external characteristic curve is read in, external characteristics each point operating condition is with two-dimensional array FL [i] [j] storage；For the outer spy of input
Linearity curve, it is necessary to the arrangement of revolving speed ascending order, and high revolving speed, the slow-speed of revolution must be included.
2) high and low rotating speed hspeed, lspeed is inputted, high underload hload, lload are inputted.
3) 4 points of ABCD are made of hspeed, lspeed, hload, lload, respectively A (hspeed, hload), B
(lspeed, hload), C (lspeed, lload), D (hspeed, lload), wherein A (hspeed, hload), B (lspeed,
It hload) is the load percentage form of expression, the torque form of expression is A (hspeed, tqa), B (lspeed, tqb).
4) torque tqa and tqb are corresponded in interpolation calculation hspeed and lspeed on external characteristic curve.
5) operating point of the revolving speed between lspeed and hspeed in two-dimensional array FL [i] [j] is identified, with two-dimensional array
FLp [i] [j] storage.
6) A point, (FLp [i] [1], FLp [i] [2] * hload) and B point are connected, AB line is obtained.
7) straight line connects BC, CD, DA, and it is key factor space region that region is constituted together with AB line.
In the step S100 of the method for the present invention, random operating condition filling is carried out to key factor space region the following steps are included:
1) based on the revolving speed width of key factor space region, random revolving speed spd is generated in conjunction with revolving speed random factor spdr,
Wherein revolving speed random factor value 0~1.Specific random revolving speed spd generation method are as follows: first to random revolving speed factor spdr with
Machine number function assignment, then random revolving speed spd is calculated based on key factor space region revolving speed width.
2) based on the load width of key factor space region, random load is generated in conjunction with random load factor loadr
Load, wherein load random factor value 0~1.Specifically, random load load generation method are as follows: first to the random load factor
Loadr random number functions assignment, then random load load is calculated based on key factor space region load width.
3) the front and back operating point M (lspd, ltq) and N (hspd, htq) in external characteristics close to random revolving speed spd, root are searched
External characteristics point O (spd, tqo) is corresponded to according to M and N interpolation calculation spd.
4) random torque tq is calculated according to tqo, exports random operating point R (spd, tq) in key factor space region.
The design experiment scheme operating condition points of input are n, repeat step 1)~4 from 1~n), that is, producing number is n's
Key factor space filling design testing program.
In step S200 of the present invention, it includes following step that the random operating condition in key factor space, which corresponds to key factor random assignment,
It is rapid:
1) 4 points of ABCD each key factor nominal value meani and tolerance range devsi are inputted.
2) by B and A two o'clock nominal value and tolerance range value calculating upper limit nominal value meantop and high limit of tolerance value devstop,
Lower limit nominal value meanbottom and low limit of tolerance value devsbottom is calculated by C and D two o'clock nominal value and tolerance range value.Its
In, upper limit nominal value meantop, high limit of tolerance value devstop, lower limit nominal value meanbottom and low limit of tolerance value
Devsbottom be based respectively on along nominal value width, on along tolerance value width, lower along nominal value width and lower wide along tolerance value
Degree calculates.
3) random nominal value mean is calculated according to upper limit nominal value meantop and lower limit nominal value meanbottom, according to
High limit of tolerance value devstop and low limit of tolerance value devsbottom calculate random tolerance value devs, thus obtain key factor with
Machine value section is (mean-devs, mean+devs).Wherein, random nominal value mean and random tolerance value devs are based respectively on name
Justice value width and tolerance value width calculate.
4) the design experiment operating condition points for combining input generate continuous equal in section (mean-devs, mean+devs)
Even distribution random value nivvalue, as key factor assignment.
The specific implementation procedure of electronic controlled diesel key factor space filling design testing program is as shown in figure 5, following right
Program flow diagram is further described:
1) program starts, initialization of variable；
2) external characteristics data are read in, key factor parameter name and design experiment scheme operating condition points are inputted, if external characteristics number
It is less than minimum operating condition point requirement according to the arrangement of non-revolving speed ascending order or design experiment scheme operating condition points, report an error prompt；
3) high revolving speed hspeed, slow-speed of revolution lspeed, high load capacity hload and underload lload are inputted；
4) A (hspeed, hload), B (lspeed, hload), C (lspeed, lload), D (hspeed, lload) are constructed
Four vertex
5) key factor parameter name is assigned to ABCD each point
6) ABCD each point key factor nominal value and tolerance range value are inputted
7) external characteristics point operating point FLi (spdi, tqi) between lspeed and hspeed is counted
8) key factor space region upper edge each point operating condition hFLi (spdi, tqi*hload) is calculated, connects this Part load
Point obtains AB line, and AB line, BC line, CD line and DA line enclosing region are key factor space
9) random revolving speed spd is calculated
10) random load is calculated
11) the front and back operating point M (lspd, ltq) and N (hspd, htq) in external characteristics close to spd, interpolation calculation are searched
Spd corresponds to external characteristics point O (spd, tqo)
12) random torque is calculated
13) 4 points of ABCD of each key factor nominal value and tolerance range value are read in
14) meantop, meanbottom, devtop, devbottom are calculated
15) means, devs, nivvalue are calculated
16) random operating point R (spd, tq, nivvalue) is exported
The design experiment scheme that above-mentioned CobraPlan is generated is after test-bed acquires data, i.e., deployable to key
Factorial analysis finds best key factor combination, can both greatly reduce design experiment number, while key factor random combine is also
The confidence level of a combination thereof can be improved.
Claims (4)
1. a kind of electronic controlled diesel key factor space filling design test method characterized by comprising
Key factor space region is identified by CobraPlan, includes:
1) read in external characteristic curve, external characteristics each point operating condition with two-dimensional array FL [i] [j] storage, the external characteristic curve of input with
The arrangement of revolving speed ascending order；
2) high and low rotating speed hspeed, lspeed is inputted, high underload hload, lload are inputted；
3) be made of 4 points of ABCD hspeed, lspeed, hload, lload, respectively A (hspeed, hload), B (lspeed,
Hload), C (lspeed, lload), D (hspeed, lload), A (hspeed, hload), B (lspeed, hload) are load
The percentage form of expression, the torque form of expression are A (hspeed, tqa), B (lspeed, tqb)
4) torque tqa and tqb are corresponded in interpolation calculation hspeed and lspeed on external characteristic curve；
5) operating point of the revolving speed between lspeed and hspeed in two-dimensional array FL [i] [j] is identified, with two-dimensional array FLp
[i] [j] storage；
6) A point, (FLp [i] [1], FLp [i] [2] * hload) and B point are connected, AB line is obtained；
7) straight line connects BC, CD, DA, and it is key factor space region that region is constituted together with AB line；
Random operating condition filling carried out to key factor space region, and to the corresponding key factor random assignment of each random operating condition, it is real
Now the operating point to key factor space region and key factor random continuous are uniformly distributed, and obtain the filling of key factor space with this
Design experiment scheme；It is described random operating condition filling is carried out to key factor space region the following steps are included:
1) based on the revolving speed width of key factor space region, random revolving speed spd, random revolving speed spd generation method are generated are as follows: first
Random revolving speed is calculated to random revolving speed factor spdr random number functions assignment, then based on key factor space region revolving speed width
spd；
2) based on the load width of key factor space region, random load load, random load load generation method are generated are as follows:
First to random load factor loadr random number functions assignment, then is calculated based on key factor space region load width and born at random
Lotus load；
3) the front and back operating point M (lspd, ltq) and N (hspd, htq) in external characteristics close to random revolving speed spd are searched, according to M and
N interpolation calculation spd corresponds to external characteristics point O (spd, tqo)；
4) random torque tq is calculated according to tqo, exports random operating point R (spd, tq) in key factor space region.
2. electronic controlled diesel key factor space filling design test method according to claim 1, it is characterised in that described
Each random operating condition corresponds to key factor random assignment and comprises the steps of:
1) 4 points of ABCD each key factor nominal value meani and tolerance range devsi are inputted；
2) by B and A two o'clock nominal value and tolerance range value calculating upper limit nominal value meantop and high limit of tolerance value devstop, by C
And D two o'clock nominal value and tolerance range value calculate lower limit nominal value meanbottom and low limit of tolerance value devsbottom；
3) random nominal value mean is calculated according to upper limit nominal value meantop and lower limit nominal value meanbottom, according to the upper limit
Tolerance value devstop and low limit of tolerance value devsbottom calculates random tolerance value devs, thus obtains key factor random value
Section is (mean-devs, mean+devs)；
4) the design experiment operating condition points for combining input, generate continuous uniform point in section (mean-devs, mean+devs)
Cloth random value nivvalue, as key factor assignment.
3. electronic controlled diesel key factor space filling design test method according to claim 2, it is characterised in that described
Upper limit nominal value meantop, high limit of tolerance value devstop, lower limit nominal value meanbottom and low limit of tolerance value
Devsbottom be based respectively on along nominal value width, on along tolerance value width, lower along nominal value width and lower wide along tolerance value
Degree calculates.
4. electronic controlled diesel key factor space filling design test method according to claim 2, it is characterised in that described
Random nominal value mean and random tolerance value devs is based respectively on nominal value width and tolerance value width calculates.
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| CN102331350A (en) * | 2011-08-19 | 2012-01-25 | 东风康明斯发动机有限公司 | Method for calibrating electrically controlled diesel engine |
| CN103837347A (en) * | 2012-11-22 | 2014-06-04 | 中国舰船研究设计中心 | Method for calibrating load limit curve of ship propulsion diesel engine under real-ship state |
| CN103969048A (en) * | 2014-02-18 | 2014-08-06 | 潍柴动力股份有限公司 | Method and device for selecting operating points |
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| CN102331350A (en) * | 2011-08-19 | 2012-01-25 | 东风康明斯发动机有限公司 | Method for calibrating electrically controlled diesel engine |
| CN103837347A (en) * | 2012-11-22 | 2014-06-04 | 中国舰船研究设计中心 | Method for calibrating load limit curve of ship propulsion diesel engine under real-ship state |
| CN103969048A (en) * | 2014-02-18 | 2014-08-06 | 潍柴动力股份有限公司 | Method and device for selecting operating points |
Non-Patent Citations (1)
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